<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>生命周期</title>
</head>
<style>
    .active{text-decoration:underline;};
    .text-danger{font-weight: bold;}
</style>

<body>
    <script src="js/vue.js"></script>
    <div id="app">
        <div :class="[]">
    </div>

    <script>
        var vm = new Vue({
            el: "#app",
            data: {
                msg: 'hello world'
            }
        })
    </script>
</body>

</html>